I dunno, my sites with breadcrumbs show up differently in the SERPs; for example the URL displays as
example.com > Category Name
Which I kind of like.
That said, they're there for the user, and not for Google.
Personally, I don't think I'd put <next category> in a breadcrumb - that's a different type of navigation.
Breadcrumbs are... well, think Hansel & Gretel. It's a trail so you can get back, not a map to go forward.